diff --git a/doomsday/apps/libdoomsday/include/doomsday/world/actions.h b/doomsday/apps/libdoomsday/include/doomsday/world/actions.h
index 1428497419..a94c27dbd4 100644
--- a/doomsday/apps/libdoomsday/include/doomsday/world/actions.h
+++ b/doomsday/apps/libdoomsday/include/doomsday/world/actions.h
@@ -32,9 +32,9 @@ typedef struct actionlink_s {
 extern "C" {
 #endif
 
-LIBDOOMSDAY_PUBLIC void P_GetGameActions();
-
+LIBDOOMSDAY_PUBLIC void      P_GetGameActions();
 LIBDOOMSDAY_PUBLIC acfnptr_t P_GetAction(const char *name);
+LIBDOOMSDAY_PUBLIC void      P_SetCurrentActionState(int state);
 
 #ifdef __cplusplus
 } // extern "C"
@@ -42,9 +42,9 @@ LIBDOOMSDAY_PUBLIC acfnptr_t P_GetAction(const char *name);
 
 #ifdef __cplusplus
 
-# include <de/String>
+#include <de/String>
 LIBDOOMSDAY_PUBLIC acfnptr_t P_GetAction(const de::String &name);
-LIBDOOMSDAY_PUBLIC void P_SetCurrentAction(const de::String &name);
+LIBDOOMSDAY_PUBLIC void      P_SetCurrentAction(const de::String &name);
 
 #endif // __cplusplus
 
diff --git a/doomsday/apps/libdoomsday/src/world/actions.cpp b/doomsday/apps/libdoomsday/src/world/actions.cpp
index 2310bb4d99..cdd197f1e0 100644
--- a/doomsday/apps/libdoomsday/src/world/actions.cpp
+++ b/doomsday/apps/libdoomsday/src/world/actions.cpp
@@ -19,7 +19,9 @@
 #include "doomsday/world/actions.h"
 #include "doomsday/gameapi.h"
 #include "doomsday/doomsdayapp.h"
+#include "doomsday/players.h"
 #include "doomsday/world/mobjthinkerdata.h"
+#include "doomsday/defs/ded.h"
 
 #include <de/DictionaryValue>
 #include <de/NativePointerValue>
@@ -33,8 +35,28 @@ using namespace de;
 static QMap<String, acfnptr_t> s_actions; ///< name => native function pointer.
 static String s_currentAction;
 
-static void C_DECL A_DoomsdayScript(struct mobj_s *mobj)
+static void C_DECL A_DoomsdayScript(void *actor)
 {
+    struct mobj_s *mobj = reinterpret_cast<struct mobj_s *>(actor);
+
+    // The actor can also be a player in the case of psprites.
+    // Look up the corresponding player.
+    {
+        auto &plrs = DoomsdayApp::players();
+        for (int i = 0; i < DDMAXPLAYERS; ++i)
+        {
+            // Note: It is assumed that the player data structure begins with a pointer to
+            // the ddplayer_t.
+
+            if (&plrs.at(i).publicData() ==
+                *reinterpret_cast<const ddplayer_t * const *>(actor))
+            {
+                // Refer to the player mobj instead.
+                mobj = plrs.at(i).publicData().mo;
+            }
+        }
+    }
+
     LOG_AS("A_DoomsdayScript");
     try
     {
@@ -77,6 +99,11 @@ void P_SetCurrentAction(const String &name)
     s_currentAction = name;
 }
 
+void P_SetCurrentActionState(int state)
+{
+    P_SetCurrentAction(DED_Definitions()->states[state].gets(QStringLiteral("action")));
+}
+
 acfnptr_t P_GetAction(const String &name)
 {
     if (!name.isEmpty())
diff --git a/doomsday/apps/plugins/common/src/world/mobj.cpp b/doomsday/apps/plugins/common/src/world/mobj.cpp
index ca9ffa4b33..f069c1f024 100644
--- a/doomsday/apps/plugins/common/src/world/mobj.cpp
+++ b/doomsday/apps/plugins/common/src/world/mobj.cpp
@@ -417,7 +417,7 @@ static bool changeMobjState(mobj_t *mobj, statenum_t stateNum, bool doCallAction
             if (shouldCallAction(mobj))
             {
                 // Custom parameters in the action function are passed to libdoomsday this way.
-                P_SetCurrentAction(Defs().states[stateNum].gets(QStringLiteral("action")));
+                P_SetCurrentActionState(stateNum);
 
                 void (*action)(mobj_t *);
                 action = de::function_cast<void (*)(mobj_t *)>(st->action);
diff --git a/doomsday/apps/plugins/doom/src/p_pspr.c b/doomsday/apps/plugins/doom/src/p_pspr.c
index c5f2599632..02e9195ea6 100644
--- a/doomsday/apps/plugins/doom/src/p_pspr.c
+++ b/doomsday/apps/plugins/doom/src/p_pspr.c
@@ -116,6 +116,9 @@ void P_SetPsprite(player_t* player, int position, statenum_t stnum)
         // Call the state action routine (modified handling).
         if(state->action)
         {
+            // Custom parameters in the action function are passed to libdoomsday this way.
+            P_SetCurrentActionState((int) stnum);
+
             state->action(player, psp);
             if(!psp->state)
                 break;
diff --git a/doomsday/apps/plugins/doom64/src/p_pspr.c b/doomsday/apps/plugins/doom64/src/p_pspr.c
index 305ebef439..6915cfb984 100644
--- a/doomsday/apps/plugins/doom64/src/p_pspr.c
+++ b/doomsday/apps/plugins/doom64/src/p_pspr.c
@@ -123,6 +123,9 @@ void P_SetPsprite(player_t *player, int position, statenum_t stnum)
         // Modified handling.
         if(state->action)
         {
+            // Custom parameters in the action function are passed to libdoomsday this way.
+            P_SetCurrentActionState((int) stnum);
+
             state->action(player, psp);
             if(!psp->state)
                 break;
diff --git a/doomsday/apps/plugins/heretic/src/p_pspr.c b/doomsday/apps/plugins/heretic/src/p_pspr.c
index 81fced98f6..e876776822 100644
--- a/doomsday/apps/plugins/heretic/src/p_pspr.c
+++ b/doomsday/apps/plugins/heretic/src/p_pspr.c
@@ -37,6 +37,8 @@
 #include "p_tick.h"
 #include "player.h"
 
+#include <doomsday/world/actions.h>
+
 #define LOWERSPEED          (6)
 #define RAISESPEED          (6)
 #define WEAPONBOTTOM        (128)
@@ -84,7 +86,11 @@ void P_SetPsprite(player_t *player, int position, statenum_t stnum)
         }
 
         if(state->action)
-        {   // Call action routine.
+        {
+            // Custom parameters in the action function are passed to libdoomsday this way.
+            P_SetCurrentActionState((int) stnum);
+
+            // Call action routine.
             state->action(player, psp);
             if(!psp->state)
             {
diff --git a/doomsday/apps/plugins/hexen/src/p_pspr.c b/doomsday/apps/plugins/hexen/src/p_pspr.c
index b23d721762..1dc6975648 100644
--- a/doomsday/apps/plugins/hexen/src/p_pspr.c
+++ b/doomsday/apps/plugins/hexen/src/p_pspr.c
@@ -320,7 +320,11 @@ void P_SetPsprite(player_t *plr, int position, statenum_t stnum)
         Player_NotifyPSpriteChange(plr, position);
 
         if(state->action)
-        {   // Call action routine.
+        {
+            // Custom parameters in the action function are passed to libdoomsday this way.
+            P_SetCurrentActionState((int) stnum);
+
+            // Call action routine.
             state->action(plr, psp);
             if(!psp->state)
             {